Television set top decoder box



FIG. 1 is a perspective view of a television set top box decoder showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a right side elevational view thereof.

Those details shown in phantom--broken lines--are intended to indicate environmental aspects and are not part of the claimed design. 

The ornamental design for a television set top decoder box, as shown and described. 